<?php
define('DB_HOST','localhost');
define('DB_USER','YC');//要改
define('DB_PASS','123456');
define('DB_NAME','review_app');

//新建连接
$conn = new mysqli(DB_HOST,DB_USER,DB_PASS,DB_NAME);

//检查链接
if ($conn->connect_error){
    die("连接失败",$conn->connect_error);
}

echo"连接成功"










